icmp_zos.go

Documentation: golang.org/x/net/ipv6

     1  // Copyright 2020 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package ipv6
     6  
     7  func (f *icmpv6Filter) accept(typ ICMPType) {
     8  	f.Filt[typ>>5] |= 1 << (uint32(typ) & 31)
     9  
    10  }
    11  
    12  func (f *icmpv6Filter) block(typ ICMPType) {
    13  	f.Filt[typ>>5] &^= 1 << (uint32(typ) & 31)
    14  
    15  }
    16  
    17  func (f *icmpv6Filter) setAll(block bool) {
    18  	for i := range f.Filt {
    19  		if block {
    20  			f.Filt[i] = 0
    21  		} else {
    22  			f.Filt[i] = 1<<32 - 1
    23  		}
    24  	}
    25  }
    26  
    27  func (f *icmpv6Filter) willBlock(typ ICMPType) bool {
    28  	return f.Filt[typ>>5]&(1<<(uint32(typ)&31)) == 0
    29  }
    30

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